2026 Cougar316RLS

The Cougar 316RLS is the floorplan that defines the full-size Cougar line. A panoramic rear living room — sofas, theater seating and windows wrapping the back wall — sits above a flush-floor main level opened by three slide-outs, with the kitchen amidships and a private front bedroom up in the raised nose over the truck bed. It is a couples' coach first, sleeping six nominally, and it spends its 36 feet on living space and finish rather than bunks. For many shoppers it is the archetypal Cougar, the layout the rest of the line is measured against.

This is a full-size fifth wheel, and the build reflects it: a five-sided aluminum superstructure, laminated HyperCore composite sidewalls, a walkable one-piece TPO roof under a lifetime limited roofing warranty, and a heated, enclosed underbelly under the Climate Guard package, tested from 0 to 110 degrees. Tandem 5,100-pound axles ride on H-rated 16-ply tires, four-point auto-leveling sets up the coach at a touch, and the equipment is residential: a 16-cubic-foot 12-volt refrigerator with a glass front, a 33,000-BTU dual-A/C cooling system, a tankless water heater and 50-amp service.

At 10,792 pounds dry against a 12,900-pound GVWR it leaves 2,108 pounds of payload, and its 1,900-pound dry pin weight — modest for a coach this size thanks to the rear-living layout pulling weight aft — still lands directly on the tow vehicle and rises loaded, so the 316RLS asks for a three-quarter-ton or one-ton truck properly equipped for a fifth wheel. At 13′4″ tall it needs route and clearance planning a travel trailer would not. For couples who want a genuine four-season home on wheels with a panoramic rear lounge, the 316RLS is the heart of the Cougar line.

Keystone's Cougar splits into two families. The full-size Cougar is the heavier flagship fifth wheel — 5,100-pound axles, H-rated tires and roughly 13′4″ of height. The Cougar Half-Ton line is engineered to be towable by a properly equipped half-ton truck, and Keystone offers it as both a fifth wheel and a travel trailer — lighter 4,400-pound axles, Goodyear Endurance tires, and lower pin or tongue weights. The 316RLS on this page is highlighted; each other profiled plan links to its own page. The full Cougar catalogue runs to dozens of floorplans across both families; the highest-demand layouts are detailed here and the rest are catalogued on the line hub.

Fresh water is the single biggest line in this floorplan’s load plan. A full 75-gallon tank is about 30% of the 2,108-pound cargo capacity — enough that whether you tow with water aboard is a real decision on the 316RLS rather than a detail.

The published dry pin weight of 1,900 pounds is 18% of this floorplan’s 10,792-pound dry weight. Fifth-wheel pin weight rides in the bed of the truck, so it comes off payload rather than off tow rating — and it rises with the trailer as you load it, not in proportion to what you put over the axles.

Nothing above changes the ceiling. Loaded to its 12,900-pound GVWR the 316RLS is towing 2,108 pounds more than its 10,792-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Tank balance is generous here: 75 gallons of fresh against 76 grey and 38 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.

Ranked by GVWR, the 316RLS sits 4 of 5 in the Cougar line among the plans that publish one: 12,900 pounds against a line that runs from 10,075 to 14,000 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Cougar 29BHL is 1,900 pounds lighter at 11,000 lb GVWR; and Cougar 364BHL is 1,100 pounds heavier at 14,000 lb GVWR.

Against the 316RLS: the Eagle 325MKTS is 1 ft shorter and sleeps 4 fewer; the Wildcat 32LIVE is 600 lb heavier and sleeps 2 fewer; the Sabre 32GKS is 608 lb heavier and 1 ft shorter and sleeps 2 fewer. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest fifth wheels from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Cougar floorplans profiled here run 6,640 to 11,625 pounds dry and 28 to 39 feet of exterior length across 8 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Cougar line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 16 of them for the 316RLS. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: exterior width, interior height, tire size (a tire description is published, a size is not). If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (99%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

How every figure here was sourced and checked is set out on the methodology page.